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PERMFILE101418
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PERMFILE101418
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Last modified
8/24/2016 9:55:42 PM
Creation date
11/24/2007 7:54:32 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1996083A
IBM Index Class Name
Permit File
Doc Date
9/11/2006
Doc Name
pgs EXH-8-87 to EXH-8-208
Section_Exhibit Name
Exhibit 08 Protection of The Hydrologic Balance Part 2
Media Type
D
Archive
Yes
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Spillway Pond J <br /> <br /> Riprap Sizing -Across top of Embankment <br /> D50 =Size of Riprap <br /> D50 = ((V X S^.17y7.58))^2 <br /> D50 =Diameter in feet <br /> V =Velocity <br /> S =Slope <br /> D50 = 0.09 feet 1.0 inches None Required <br /> Spillway Pond J <br /> Determine flow velocity down 3h:1v embankment <br /> Pond J Emergency Spillway <br /> Manning's Equation <br /> Flow In a Trapezoidal Channel <br /> DEPTH D 0.300 FEET <br /> WIDTH W 5.000 FEET <br /> Slope S 0.330 F,CPRESS AS DECIMAL <br /> Mannings "N" N 0.040 EXPRESS AS DECIMAL <br /> SIDE SLOPE X 2.000 SLOPE =X:1 <br /> AREA=(W'D)+(X'D^2p 1.66 FEET^2 <br /> WETTED PERIMETER=(W)+2'[((X'Dy~2+D^2)^0.5] 6.34 FEET <br />• R=AREA/WETTED PERIMETER <br />' <br />^ <br />' <br />^ 0.26 <br /> V=(1.49/N) <br />.667) <br />(S <br />.5p <br />(R 8.83 FT/SEC <br /> Q=AXV= 14.83 CFS <br /> Q REQUIRED -Peak Discharge 12.45 CFS <br /> Sediment Pond J <br /> Riprap Sizing -Down Face of Embankment -Pond J <br /> D50 =Size of Riprap <br /> D50 = ((V X S^.17u7.58))^2 <br /> D50 = Diameter in feet <br /> V =Velocity <br /> S =Slope <br /> D50 = 0.9 feet 11 inches <br /> RUN-OFF VOLUME - - Pond K Precip Direct Run-off <br /> Area Acres Curve # Amount Run-off Vol A-F <br /> Disturbed 4.93 87 1.8 0.75 0.31 <br /> Derelict 0.66 74 1.8 0.26 0.01 <br /> Farmstead 1.43 82 1.8 0.52 0.06 <br /> Orchard 0.54 72 1.8 0.21 0.01 <br /> TOTAL 7.56 0.40 <br /> TOTAL REQUIRED WATER VOLUME - - A-F 0.40 <br />PR-07 Exh-8 - 165 - 2/03 <br />
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